TY - GEN
T1 - Tunnel excavations supported by frozen soil bodies
T2 - ITA-AITES World Tunnel Congress, ITA-AITES WTC 2023 and the 49th General Assembly of the International Tunnelling and Underground Association, 2023
AU - Schindler, U.
AU - Chrisopoulos, S.
AU - Yan, W.
AU - Cudmani, R.
N1 - Publisher Copyright:
© 2023 The Author(s).
PY - 2023
Y1 - 2023
N2 - The significance of ground freezing is becoming ever more germane, because the design of new urban tunneling systems requires more complex geometries and higher strengths of the improved subsoil, which are limited with conventional construction methods. Therefore, advanced constitutive models for frozen soils must be developed and implemented in commercial Finite Element Analysis (FEA) codes for ground freezing designs under such complex conditions. This study presents a recently proposed elastic-viscoplastic model describing the rate-, stress-, and temperature-dependent mechanical behavior of frozen soils under compressive and tensile loading along with its implementation in a FEA code. After calibrating and validating the model for frozen Fairbanks silt, we simulated the construction of a twin-tunnel excavation supported by frozen soil bodies and compared the numerical results with experimental data from the literature. The good agreement demonstrates the model’s ability to predict the stability and evaluate the deformations of frozen soils in tunneling scenarios.
AB - The significance of ground freezing is becoming ever more germane, because the design of new urban tunneling systems requires more complex geometries and higher strengths of the improved subsoil, which are limited with conventional construction methods. Therefore, advanced constitutive models for frozen soils must be developed and implemented in commercial Finite Element Analysis (FEA) codes for ground freezing designs under such complex conditions. This study presents a recently proposed elastic-viscoplastic model describing the rate-, stress-, and temperature-dependent mechanical behavior of frozen soils under compressive and tensile loading along with its implementation in a FEA code. After calibrating and validating the model for frozen Fairbanks silt, we simulated the construction of a twin-tunnel excavation supported by frozen soil bodies and compared the numerical results with experimental data from the literature. The good agreement demonstrates the model’s ability to predict the stability and evaluate the deformations of frozen soils in tunneling scenarios.
UR - http://www.scopus.com/inward/record.url?scp=85160355960&partnerID=8YFLogxK
U2 - 10.1201/9781003348030-108
DO - 10.1201/9781003348030-108
M3 - Conference contribution
AN - SCOPUS:85160355960
SN - 9781003348030
T3 - Expanding Underground - Knowledge and Passion to Make a Positive Impact on the World- Proceedings of the ITA-AITES World Tunnel Congress, WTC 2023
SP - 895
EP - 903
BT - Expanding Underground - Knowledge and Passion to Make a Positive Impact on the World- Proceedings of the ITA-AITES World Tunnel Congress, WTC 2023
A2 - Anagnostou, Georgios
A2 - Benardos, Andreas
A2 - Marinos, Vassilis P.
PB - CRC Press/Balkema
Y2 - 12 May 2023 through 18 May 2023
ER -